diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3108-drm-amd-display-readd-msse2-to-prevent-Clang-from-em.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3108-drm-amd-display-readd-msse2-to-prevent-Clang-from-em.patch | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3108-drm-amd-display-readd-msse2-to-prevent-Clang-from-em.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3108-drm-amd-display-readd-msse2-to-prevent-Clang-from-em.patch new file mode 100644 index 00000000..bb3b2922 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3108-drm-amd-display-readd-msse2-to-prevent-Clang-from-em.patch @@ -0,0 +1,95 @@ +From 564dc5dcb5b92e0ee99009e84cdf26855296f694 Mon Sep 17 00:00:00 2001 +From: Nick Desaulniers <ndesaulniers@google.com> +Date: Mon, 22 Jul 2019 15:31:05 -0700 +Subject: [PATCH 3108/4256] drm/amd/display: readd -msse2 to prevent Clang from + emitting libcalls to undefined SW FP routines + +arch/x86/Makefile disables SSE and SSE2 for the whole kernel. The +AMDGPU drivers modified in this patch re-enable SSE but not SSE2. Turn +on SSE2 to support emitting double precision floating point instructions +rather than calls to non-existent (usually available from gcc_s or +compiler_rt) floating point helper routines for Clang. + +This was originally landed in: +commit 10117450735c ("drm/amd/display: add -msse2 to prevent Clang from emitting libcalls to undefined SW FP routines") +but reverted in: +commit 193392ed9f69 ("Revert "drm/amd/display: add -msse2 to prevent Clang from emitting libcalls to undefined SW FP routines"") +due to bugreports from GCC builds. Add guards to only do so for Clang. + +Link: https://bugs.freedesktop.org/show_bug.cgi?id=109487 +Link: https://github.com/ClangBuiltLinux/linux/issues/327 + +Suggested-by: Sedat Dilek <sedat.dilek@gmail.com> +Suggested-by: Sami Tolvanen <samitolvanen@google.com> +Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> +Signed-off-by: Alex Deucher <alexander.deucher@amd.com> +--- + drivers/gpu/drm/amd/display/dc/calcs/Makefile | 4 ++++ + drivers/gpu/drm/amd/display/dc/dcn20/Makefile | 4 ++++ + drivers/gpu/drm/amd/display/dc/dml/Makefile | 4 ++++ + drivers/gpu/drm/amd/display/dc/dsc/Makefile | 4 ++++ + 4 files changed, 16 insertions(+) + +diff --git a/drivers/gpu/drm/amd/display/dc/calcs/Makefile b/drivers/gpu/drm/amd/display/dc/calcs/Makefile +index 95f332ee3e7e..16614d73a5fc 100644 +--- a/drivers/gpu/drm/amd/display/dc/calcs/Makefile ++++ b/drivers/gpu/drm/amd/display/dc/calcs/Makefile +@@ -32,6 +32,10 @@ endif + + calcs_ccflags := -mhard-float -msse $(cc_stack_align) + ++ifdef CONFIG_CC_IS_CLANG ++calcs_ccflags += -msse2 ++endif ++ + CFLAGS_dcn_calcs.o := $(calcs_ccflags) + CFLAGS_dcn_calc_auto.o := $(calcs_ccflags) + CFLAGS_dcn_calc_math.o := $(calcs_ccflags) -Wno-tautological-compare +diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/Makefile b/drivers/gpu/drm/amd/display/dc/dcn20/Makefile +index e9721a906592..f57a3b281408 100644 +--- a/drivers/gpu/drm/amd/display/dc/dcn20/Makefile ++++ b/drivers/gpu/drm/amd/display/dc/dcn20/Makefile +@@ -18,6 +18,10 @@ endif + + CFLAGS_dcn20_resource.o := -mhard-float -msse $(cc_stack_align) + ++ifdef CONFIG_CC_IS_CLANG ++CFLAGS_dcn20_resource.o += -msse2 ++endif ++ + AMD_DAL_DCN20 = $(addprefix $(AMDDALPATH)/dc/dcn20/,$(DCN20)) + + AMD_DISPLAY_FILES += $(AMD_DAL_DCN20) +diff --git a/drivers/gpu/drm/amd/display/dc/dml/Makefile b/drivers/gpu/drm/amd/display/dc/dml/Makefile +index 1735fc1e2eb1..95fd2beca80c 100644 +--- a/drivers/gpu/drm/amd/display/dc/dml/Makefile ++++ b/drivers/gpu/drm/amd/display/dc/dml/Makefile +@@ -32,6 +32,10 @@ endif + + dml_ccflags := -mhard-float -msse $(cc_stack_align) + ++ifdef CONFIG_CC_IS_CLANG ++dml_ccflags += -msse2 ++endif ++ + CFLAGS_display_mode_lib.o := $(dml_ccflags) + + ifdef CONFIG_DRM_AMD_DC_DCN2_0 +diff --git a/drivers/gpu/drm/amd/display/dc/dsc/Makefile b/drivers/gpu/drm/amd/display/dc/dsc/Makefile +index e019cd9447e8..17db603f2d1f 100644 +--- a/drivers/gpu/drm/amd/display/dc/dsc/Makefile ++++ b/drivers/gpu/drm/amd/display/dc/dsc/Makefile +@@ -9,6 +9,10 @@ endif + + dsc_ccflags := -mhard-float -msse $(cc_stack_align) + ++ifdef CONFIG_CC_IS_CLANG ++dsc_ccflags += -msse2 ++endif ++ + CFLAGS_rc_calc.o := $(dsc_ccflags) + CFLAGS_rc_calc_dpi.o := $(dsc_ccflags) + CFLAGS_codec_main_amd.o := $(dsc_ccflags) +-- +2.17.1 + |